Sirius 40 DS

BoatsSirius 40 DS

See her sail

The Sirius 40 DS, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from Sailing Northern Brees

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

LivelySea-kindly

Her moderate displacement on a moderate beam gives 33 — a sea-kindly motion in a seaway.

Comfort ratio 33

CoastalBluewater

1.82 — just under the 2.0 offshore line; her beam is modest for her weight.

Capsize screening 1.82

LightHeavy

232 — moderately heavy for her waterline, a balanced cruising weight.

Displacement / length 232

EasygoingPowered-up

16.2 — moderate power for her weight; steady, all-round performance.

Sail area / displacement 16.2

TenderStiff

30% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 30%

A capable cruiser that sits just inside the offshore line — coastal work with real passages in her.

Heavier than ~83% of boats her size on file
Draws more than ~90% of boats her size on file
Beamier than ~78% of boats her size on file

Compared with 2628 boats of the same type within a quarter of her length.

What the fleet has seen

The Sirius 40 DS, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The Sirius 40 DS is a 12.9-meter fractional sloop designed by Marc-Oliver von Ahlen and built by Sirius-Werft since 2015. It features a fin keel with a rudder on a partial skeg, displacing 11,600 kg. Optional keel configurations include fixed drafts of 2.0m or 1.75m, a twin keel at 1.45m, and a swing keel adjustable from 0.95m to 2.45m. Aboard *Sailing Northern Brees*, the boat sailed along England's south coast, encountering 30-knot squalls near Beachy Head and navigating the strong tidal currents of the English Channel.5:44 The crew reported a near-collision with a dredging vessel off Brighton and assisted in a rescue operation for two people in the water.6:52 The boat's journey included stops at Royal Clarence Marina in Gosport and Poole, before the crew altered plans at Portland Bill to head south towards France.10:44

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen once across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

Who's been looking

Market signal

Crews the fleet has filmed weighing this model up — no sale seen, and no asking price.

1channel looked into buying

Creators toured this boat and are considering it for future purchase
from Sailing Northern Breesseen April 202617:42

From the fleet's own footage — our observed signal, not broker listings.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions

Weights

Ballast / displacement

29.7%

Rig & sail area

Rig

Fractional Sloop

Ratios

SA / displacement

16.2

Displacement / length

231.9

Comfort ratio

32.5

Capsize screening

1.82

Hull speed

8.1 kn

Pounds / inch immersion

1753

Hull

Hull type

Fin w/rudder on partial skeg

Construction

Fiberglass

Ballast type

Cast iron and/or lead

Production

Years built

First built 2015

Designer

Marc-Oliver von Ahlen, Yachtdesign v. Ahlen

Builder

Sirius-Werft, Sirius -Werft GmbH

Boats like this, on the water

More boats like her, on the water

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

X-yachts Xc-4212.81 mSame hull familyNear-identical lengthA Niels Jeppesen-designed performance cruiser balancing a deep bulb keel with a displacement-heavy hull for offshore stability

#9 | At Sea Reaction | ‘Encountering Storm Force 10’6:45 from The Mariner

Hunter Marine 42 Passage CC12.95 mSame hull familyNear-identical lengthA 12.95-metre center-cockpit cruiser with a wing keel and a 1.5-metre draft, built for stable, easy-handling cruising

The INSANE Aft Cabin Center Cockpit Hunter Passage 4203:13 from Lady K Sailing

Pearson Yachts 424 Ketch12.90 mSame hull familyNear-identical lengthA masthead ketch featuring an aft cockpit layout and a 1.6-metre draft for versatile coastal and offshore cruising

The MIGHTY But CHEAP Pearson 424 from Practical Sailor

Endeavour 4212.88 mSame hull familyNear-identical lengthA Johan Valentijn-designed masthead sloop with a skeg-mounted rudder, built for stable, comfortable offshore cruising

The Cheap Big Cruising Sailboat - Endeavour 423:10 from Practical Sailor

Rustler Yachts 4212.80 mSame hull familyNear-identical lengthA 12.8-metre cutter with a 40% ballast ratio, engineered for heavy-weather stability and long-range blue water autonomy

Rustler 42 - A Yacht Delivery from St Lucia to Antigua0:28 from Halcyon Yachts - International Yacht Delivery

J Boats Tillotson Pearson J/4212.80 mSame hull familyNear-identical lengthA 12.8-metre cruiser featuring a fin keel with bulb and spade rudder, designed for offshore stability and speed

Back on land after nearly 3 years - nasty surprise?? Shipyard part 1/20:47 from Eternal Sailing

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

Sirius 35 DSA 35-foot fractional sloop featuring a deep 1.98-metre draft and a balanced displacement-to-ballast ratio for offshore stability Sirius 32 DSA deck saloon masthead sloop with a shoal-draft fin keel, designed for comfortable cruising in a compact 32-foot hull Sirius 38DSA Georg Nissen-designed deck saloon cruiser featuring a stiff hull and a protected rudder on a partial skeg Sirius 31 MA Peter Schmidt-designed masthead sloop with a skeg-hung rudder, built for stable, comfortable cruising since 1988

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